Lower Extremity Musculature

Question 1

Which structure articulates with the acetabulum of the pelvis?

Answer 1

head of the femur

Question 2

Muscles of the deep posterior compartment of the leg have tendons that enter the foot by

Answer 2

Running behind the medial malleolus

Question 3

What is the function of the patella?

Answer 3

To redirect the force of the patellar ligament (quadriceps tendon), increasing the force output

Question 4

Stabilize femur during gait/standing. Permit rotation about the acetabulofemoral joint

Contains the: Gluteus and Iliotibial tract

Answer 4

Pelvic musculature

Question 5

Hip joint. Originate on sacrum and ilium, insert on femur and iliotibial tract.

Answer 5

Acetabulofemoral Joint

Question 6

Long band of fascia that extends from hip to knee
Gluteus maximus and tensor fascia latae

Answer 6

Iliotibial tract

Question 7

Inability for muscles to counter balance shifting weight while walking
Drop of pelvis when lifting leg
Weakness or damage to gluteus medius/minimus

Answer 7

Trendelenburg Gait

Question 8

Some flex, extend, adduct, rotate the thigh

Originate on lumbar vertebrae and pelvis, insert on femur

Answer 8

Proximal thigh musculature

Question 9

Gluteus maximus, medius, and minimus are part of the:

Answer 9

POSTERIOR PART OF Proximal thigh musculature

Question 10

Psoas major and minor and Iliacus

Together referred to as iliopsoas group

Form part of the:

Answer 10

ANTERIOR PART OF Proximal thigh musculature

Question 11

Some flex and extend the leg - originate on pelvis and femur, insert on tibia and fibula

Answer 11

Thigh Musculature

Question 12

Rectus femoris
Vastus group (Medialis, intermedialis, lateralis)
Sartorius form part of the:

Answer 12

ANTERIOR PART OF thigh musculature

Question 13

Adductor longus and Adductor magnus form part of the:

Answer 13

MEDIAL PART OF thigh musculature

Question 14

Biceps femoris and Semitendinous form part of the:

Answer 14

POSTERIOR PART OF thigh musculature

Question 15

Permit movement of the knee, ankle, and foot

Stabilize upright posture

Reduced mobility (origins on tibia and fibula, inerstions on tarsals and phalanges)

Answer 15

Leg Musculature

Question 16

Tibialis anterior
Extensor digitorum are part of the

Answer 16

ANTERIOR PART OF leg musculature

Question 17

Fibularis (Peroneus) - longus and brevis are part of the

Answer 17

LATERAL PART OF leg musculature

Question 18

Gastrocnemius
Soleus

Answer 18

SUPERFICIAL POSTERIOR PART OF leg musculature

Question 19

Tibialis posterior
Flexor digitorum are part of the

Answer 19

DEEP POSTERIOR PART OF leg musculature

Question 20

Is mostly fast twitch fibers (running and jumping muscle).

Answer 20

Gastrocnemius

Question 21

Is mostly slow twitch fibers (fatigue resistant muscle, for example for hiking).

Answer 21

Soleus

Question 22

Muscles of the deep posterior compartment of the leg have tendons that enter the foot by

Answer 22

Running behind the medial malleolus

Question 23

Someone who displays a Trendelenburg gait leans over the hip that is bearing weight as they walk. This condition can arise from weakness in which muscles?

Answer 23

Gluteus minimus and medius

Question 24

The calcaneal (Achilles) tendon attaches to which muscles

Answer 24

Gastrocnemius and Soleus

Question 25

Which of the quadricep femoris muscles contributes to flexion of the thigh? Why does this
muscles action differ from the other three muscles?

Answer 25

Rectus femoris because it originates on the ileum of the pelvis. Specifically, the rectus femoris
crosses both the hip and knee joints whereas the vasti muscles only cross the knee joint.
Vasti muscles only cause knee extension, whereas rectus femoris (due to dual crossing of
joints) flexes the thigh and extends the knee.